Tests and Diagnostics

 

To test the cache memory, a pass-through write-read comparison of ‘5Ah’

 

data is run repeatedly to the test area (‘7000’: ‘Program’ size to ‘7000’:

 

‘7FFF’ (32 KB)) to check the hit-miss ratio (on/off status) for CPU cache

 

memory. One test takes 3 seconds.

 

Number of misses < Number of hits → OK

 

Number of misses ≥ Number of hits → Fail

Subtest 04

Stress

 

Write/Read buffer (1 size = B30h) is prepared in the conventional memory.

 

The data is made in the Write Buffer, the data in Write Buffer is written in the

 

area of address of 1MB or after. The data is red in the Read Buffer and data is

 

compared in area up to the maximum size.

 

Data: FFh, FFh, FFh, FFh, FFh, 00h, 00h, 00h, 00h,

 

FFh, FFh, FFh, 00h, FFh, 00h, 00h, FFh, 00h,

 

00h, FFh, FFh, FFh, FFh, 00h, 00h, 00h, AAh

3-22 [CONFIDENTIAL]) TECRA M11/Satellite Pro S500M Series Maintenance Manual (960-813)

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Image 131
Toshiba S500M manual Memory. One test takes 3 seconds